-The Above Table Shows Production Points on Sweet-Tooth Land?s Production

$$\begin{array} { | l | l | l | } \hline \text { Point } & \begin{array} { l } \text { Production } \\\text { chocolate } \\\text { bars }\end{array} & \begin{array} { l } \text { Production } \\\text { cans of cola }\end{array} \\\hline \text { A } & 0 & 100 \\\hline \text { B } & 10 & 90 \\\hline \text { C } & 20 & 70 \\\hline \text { D } & 30 & 40 \\\hline \text { E } & 40 & 0 \\\hline\end{array}$$
-The above table shows production points on Sweet-Tooth Land?s production possibilities frontier. What is the opportunity cost of one can of cola if Sweet-tooth Land moves from point C to point B?

A) 2 chocolate bars per can of cola
B) 20 chocolate bars per can of cola
C) 10 chocolate bars per can of cola
D) 1/2 chocolate bars per can of cola